52140: RtdNotification: Unknown APNs errorERROR: 52140error-52140 page anchorERROR Error - 52140error---52140 page anchor RtdNotification: Unknown APNs errorrtdnotification-unknown-apns-error page anchor Possible Causespossible-causes page anchor Temporary outage of some components of APN notification flow or internal bug. Possible Solutionspossible-solutions page anchor Ask customer support for investigation.